.login_container {
    width: 100%;
    height: calc(100% - 50px);

    /* 为了让 login-dialog 垂直水平居中, 使用弹性布局 */
    display: flex;
    justify-content: center;
    align-items: center;
}
.login_dialog {
    width: 500px;
    height: 350px;

    background-color: rgba(222, 220, 220, 0.8);
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
}
table {
    /* margin-top: -50px; */
    margin-bottom: 50px;
}
th {
    font-size: 22px;
    height: 90px;
}
td {
    text-align: center;
    height: 50px;
    width: 100px;
}

#username,#password {
    height: 40px;
    /* width: ; */
    font-size: 18px;
    text-indent: 10px;
    border-radius: 8px;
    border-color: #848688;
}
#submit {
    width: 330px;
    height: 40px;
    background-color: orange;
    color: white;
    font-size: 18px;
    border: none;
    border-radius: 5px;
}
#submit:hover {
    background-color: gray;
}
